We just had our design meeting. The bump outs and stretches are the big ones. I did a 2 foot stretch through the kitchen. I have a Lilac. I moved the breakfast bar in 2 feet. That gives more room between the kitchen and living room. Stretched garage, and Lanai. I added pocket doors where ever I could. Between Kitchen and Laundry. One off the Bedrooms. You can do it between the MBR and Bath too, but have to move the door. We also widened the driveway so we can drive straight into the golf car garage. Lastly, consider the cabinet upgrade. I also added some big drawers for the lower cabinets. I put pots and pans in them. Easy access. Replacing cabinets later is a big job. Also added electrical/cable, every bedroom and lanai. Outside I added some faucets and extra electrical. One on every side of the house. You need a hose to clean your Lanai. 2 Towel Bars in the MBathRoom. The attic stairs are an after build. You can do a radiant barrier later that will keep the attic cooler. If you don't do tile now, and want it later in LR/DR, you will have some disruption. When they lay tile you aren't supposed to walk on it until it sets. Our friends did after build tile and said it was a real pain. We want Hardwood flooring in LR/DR, so will do that later. We did the tile now since I didn't like the vynal. We did do some more things, but they were personal preference stuff. Have fun with your build. It's a little overwhelming but fun.